1948509 has 8 divisors (see below), whose sum is σ = 2886720. Its totient is φ = 1298988.

The previous prime is 1948493. The next prime is 1948511. The reversal of 1948509 is 9058491.

It is not a de Polignac number, because 1948509 - 2⁴ = 1948493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1948519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36057 + ... + 36110.

It is an arithmetic number, because the mean of its divisors is an integer number (360840).

2^1948509 is an apocalyptic number.

It is an amenable number.

1948509 is a deficient number, since it is larger than the sum of its proper divisors (938211).

1948509 is an equidigital number, since it uses as much as digits as its factorization.

1948509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72176 (or 72170 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1948509 is about 1395.8900386492. The cubic root of 1948509 is about 124.9014476532.

The spelling of 1948509 in words is "one million, nine hundred forty-eight thousand, five hundred nine".